Sash-balance



R. BURGES.

SASH BALANCE.

(No Model.)

Patented May 12, 1891.

a 5' H. F 5

-DUUDUUUUU- UNITED STATES PATENT OFFICE.

RAY BURGES, OF OSVVEGO, NEAV YORK.

SASH-BALANCE.

- SPECIFICATION formingpart of Letters Patent No. 452,258, dated May 12,1891.

Application filed February 28, 1891. Serial No. 383,171. (No model.)

To all whom it may concern:

Be it known that I, RAY BURGES, a citizen of the United States, residingat Oswego, in the county of Oswego and State of New York, have inventedcertain new and useful Improvements in Spring Balancing Appliances forWindow-Sashes; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame. 1

My invent-ion relates to spring appliances for balancing and assistingin operating window-sas'hes and it consists in a scroll or coiled orother equivalent spring, in combination with a toothed wheel and itsarbor and a supporting-bar on which the spring and toothed wheel aremounted, the said parts being con.- nected to the sash and the wheelthereof working a rack-bar applied to the frame of the window, as willbe hereinafter described.

It also consists in mounting the said parts on a flexiblesupporting-bar, whereby ease and accommodation in case of bind aresecured; and it also consists in the combination of thehereinafter-described spring balancing mechanism and its support, asecondary toothed wheel for steadying the mechanism, and a toothed rackinto which the two toothed wheels gear, as will be hereinafterdescribed; and it finally consists in providing a series of stop-holesin the secondary toothed wheel and providing a spring-pin in connectionwith said wheels with holes and the spring balancing mechanism, wherebythe sash can be locked up or down, as occasion may require, the said pinserving also as a permanent night or safety fastening.

In the accompanying drawings, Figure 1 is l a front elevation andpartial broken section of a window frame and sashes having my inventionapplied thereto. Fig. 2 is a broken edge View of one of the sashes andmy improved spring balancing mechanism on an enlarged scale. Fig. 3 is adetail sectional view showing a portion of the rack and spring balancingmechanism; and Fig. 4is abroken detail view showing a portion of thewindowframe and the rack.

A in the drawings indicates the frame, and B B the window-sashes.

C is a rack-bar set into the inner edge of the frame A and extending upto the necessary extent to accommodate the up-and-down movement of thelower sash B.

D is a bent supporting-bar bifurcated at its upper and lower ends andformed with journal or arbor bearings a a at its ends. This bar isfastened, as indicated at 6, about midway of its length to a recessedportion of the sash B, and its upper and lower ends are allowed tovibrate in recesses 17 I), provided in the edge of the sash.

E is an arbor or short shaft fitted'in the bearings a a and turningfreely therein. To this shaft a scroll or coiled spring F is securelyfastened by one of its ends and by its other end to a bracket-pine ofthe bar D, as

shown. This spring winds and unwinds by the revolution of the arbor, andit is located between the prongs of the upper bifurcated end of the barD and maybe inclosed within a light housing or casing G, as shown. 7

H is a primary toothed wheel keyed to the arbor or shaft E on one sideof the spring. This wheel and the spring have freedom to Vibrate withthe upper end of the bar D in the recess 1) formed in the sash. Thetoothed wheel H is of the diameter which enables it to gear with therack O with the windowframe, as illustrated.

I is a secondary toothed wheel keyed to an arbor E and revolving betweenthe prongs of the lower bifurcated end of the bar D. This wheel alsogears with the rack C and is free to vibrate with the lower end of thebar in the recess a of the sash. Asimilar device to the one describedmay be applied on the other edge of the sash and to the window-frame,aiid a pair of the devices may be applied on the upper sash, and in eachof the secondary wheels a series of stop-holes 01 may be provided, andin coinciding relation to one of said holes of each wheel aspring-locking pin J may be provided on the sash, and by passing saidpin into such hole the said wheel will be locked and prevented fromturning, and by withdrawing said pin and holding or fastening it backthe wheel will be left free to revolve. Any one of the series of holesthat may be in coincidence with the pin can, be used for this purpose.

From the atorcgoing description it will be seen that when the sash israised the primary toothed wheels will gear into the rack and be causedto revolve, and thereby unwind the springs which have been previouslywound to their full tension, such winding having been accomplished bythe lowering of the sash to the sill and the gearing of the said toothedwheels with the racks during the lowering operation. New by lowering thesash the toothed wheels are revolved by the toothed racks and thesprings again wound to their proper operating capacity or tension, andthus power is secured in the springs, which willassist the operator inraising the sash. During the revolutions of the primary wheels thesecondary wheels gear into the racks, and thus the sash is kept in amore perfect balance and from bindin If it is desired to lock the sashin a raised position at any intermediate point, the springpins J areentered into one or the other of the locking-holes of the secondarywheels, and the sash thereby held in such position.

I contemplate as a modification of my invention making thesupporting-bars straight instead of bowed; but with such constructionthey would not have as good a spring action and the recesses in thesashes for their reception would have to be deeper. Hence it is I alsocontemplate moditying the form of the spring or using any other suitablespring at the end of the supportingbar; but the form shown ispreferable.

\Vhat I claim as my invention is 1. The combination, with a window-sash,ot' a spring supporting-bar having a short shaft or arbor journaled inits upper end, a scroll or coiled or other suitable spring fastened byone of its ends to said arbor and by its other end to the susiporting-bar, and a toothed wheel secured to said arbor, substantiallyas described.

2. The combination, with the supportingbar, the arbor, the scroll orcoiled or other suitable spring, toothed wheel, and rack-bar, of thesecondary toothed wheel at the lower end of the supporting-bar,substantially as described.

The combination, with the spring balancing device described, consistingof a spring su pporting-bar, a short shaft or arbor, a scroll or coiledor other suitable spring, and two wheels, of the spring locking-pinadapted for enteringlocking-holes in the secondary wheel, substantiallyas described.

In testimony whereofI hereunto affix my signature in presence of twowitnesses.

KAY BURGES.

\Vitnesses:

E. T. FENwIcK, (7,". Snvmmnen.

